22"W X 10"H [Duct Opening] Steel Air Vent Return Grille - HVAC VENT DUCT COVER DIFFUSER - [Outer Dimensions: 23.75"W X 11.75"H] w36h36 + Product Details Size - 14" Round Duct Pipe For 10 duct opening FR M 414 White

+ Product Details Size - 14"w X 26"h is the size for the duct opening measurement only

+ Product Spec Sheet Floor Register Spec Sheet

It has an outer surface made of high-quality aluminum foil and an inner surface made of metalized PET with inside high-tensile spring steel wire

+ Product Details Size - 20"w X 18"h is the size for the duct opening measurement only

22"W X 10"H [Duct Opening] Steel Air Vent Return Grille HVAC VENT DUCT COVER DIFFUSER [Outer Dimensions: 23.75"W X 11.75"H] w36h36 + Product Details Size 14" Round Duct Pipe For 10 duct opening FR M 414 White + Product Details Size 14"w X 26"h is the size for the duct opening measurement only + Product Spec Sheet Floor Register Spec Sheet